nervous system .

• what is the primary function of the nervous system ?

  to relay messages from the brain
• what are the two main functions of the nervous system ?

  collecting information and coordinating organs
• what are the two divisions of the nervous system ?

  • central nervous system
  • peripheral nervous system
• what does the central nervous system do ?

  coordinates activity and produces body responses
• what are the components of the central nervous system ?

  brain and spinal cord
• what is the role of the brain in the nervous system ?

  center of all human consciousness
• how does the cerebral cortex differ in humans compared to animals ?

  it is much more advanced in humans
• what is the function of the spinal cord ?

  carries information to and from the brain
• what does the peripheral nervous system do ?

  sends information to the central nervous system
• what are sensory neurones responsible for ?

  sending information from the environment
• what do motor neurones transmit ?

  messages from the CNS to muscles and glands
• what are the two divisions of the peripheral nervous system ?

  • autonomic nervous system
  • somatic nervous system
• what does the autonomic nervous system govern ?

  automatic functions like heart rate and digestion
• what is the role of the somatic nervous system ?

  controls muscle movement and receives sensory information
• what are the two divisions of the autonomic nervous system ?

  • sympathetic nervous system
  • parasympathetic nervous system
• what is the function of the sympathetic nervous system ?

  it prepares the body to respond to threats
• what does the parasympathetic nervous system do ?

  relaxes the body after sympathetic activation
• how do the sympathetic and parasympathetic nervous systems interact ?

  • they balance each other out
  • produce opposite effects on the body
• why do we need both the sympathetic and parasympathetic systems ?

  to respond to threats and relax afterward